Chinese Optics Letters, 2014, 12 (11): 110608, Published Online: Oct. 27, 2014
Design of double-weight code for synchronous OCDMA systems with power control Download: 676次
Abstract
Double-weight optical code division multiple access (OCDMA) systems are proposed for studying differentiated quality-of-service transmission. Based on quadratic congruence code (QCC), we construct a one-dimensional double-weight code family, which can be well utilized in incoherent synchronous double-weight OCDMA networks. By introducing algebraic transformation to code sequences of QCC in level 1, we obtain multiple double-weight codes with cross-correlation 1. Under the same-bit-power assumption, the performance of low-weight codes can be significantly improved and is always superior to that of high-weight codes in double-weight OCDMA systems with power control. This property is contrary to previous conclusions under the same-chip-power assumption.
Fujun Chen, Fengguang Luo, Gang Feng, Bin Li, Cheng He. Design of double-weight code for synchronous OCDMA systems with power control[J]. Chinese Optics Letters, 2014, 12(11): 110608.